Quick change tool holder



Oct. 4, 1955 A. E. NICKLESS QUICK CHANGE TOOL. HOLDER Original FiledDec. 10, 1948 IN VEN TOR. I!!! t. NICK! 55,

ATTORNEY United States Patent QUICK CHANGE TOOL HOLDER Allen E.Nickless, Frankenmuth, Mich., assignor to Uni- 2,719,722 Patented Oct.4, 1955 carried by the member 11. At the outer end of the locking ring14 there is an inwardly directed flange 17a, which versal EngineeringCompany, Frankenmuth, Mich., a

corporation of Michigan Continuation of abandoned application Serial No.64,661, December 10, 1948. This application October 11, 1952, Serial No.314,319

8 Claims. (31. 279-91) This application constitutes a continuation of myapplication Serial No. 64,661, filed December 10, 1948, on a QuickChange Tool Holder, and now abandoned.

My invention relates to a new and useful improvement in a quick changetool holder whereby a quick change may be made from one type or size ofa cutting tool to another size or type of cutting tool, and isespecially useful on progressive machining operations.

It is an object of the present invention to provide a structure wherebya quick change of tools may be effected without the loss of accuracy, sothat when the tool has been removed and replaced the replacing tool willbe centered exactly as was the tool which preceded it.

Another object of the invention is the provision in a quick change toolholder of a structure which may be economically manufactured, which islight, compact, durable, highly efiicient in use and easily and quicklyoperated.

Other objects will appear hereinafter.

It is recognized that various modifications and changes may be made inthe detail of structure illustrated without departing from theinvention, and it is intended that such shall be embraced within thescope of the claims which form a part hereof.

Forming a part of the specification are drawings in which Fig. 1 is aside elevational view of the supporting member or adapter with a partbroken away and a part shown in section,

Fig. 2 is a side elevational view of the supporting mem bet or adapterwith the securing ring removed,

Fig. 3 is a front elevational view of the supporting member or adapter,

Fig. 4 is a perspective view of the securing or locking ring with a partbroken away and a part shown in section,

Fig. 5 is a perspective view of the tool holding adapter with a partbroken away and a part shown in section,

Fig. 6 is a fragmentary elevational view of a part of the supportingmember or adapter and the tool holder,

Fig. 7 is a side elevational view of the tool holder and adapter withparts broken away and parts shown in section, illustrating a slightmodification.

The invention is adapted for use on milling machines, boring mills,turret lathes, and similar metalworking machines. It is particularlyadapted where progressive machining operations on a single piece ofmaterial are to be effected, in which operations the work piece is leftin the lathe or other metalworking machine and various parts of the workpiece are operated upon by different types of tools.

In the drawings I have indicated an adapter or supporting member 11,which has an external taper to fit the tapered socket of the machinewith which used and which is provided with a flange 54 having thenotches 55 formed therein. This supporting member or adapter 11 isprovided with a threaded portion 13 on which is adapted to thread thelocking ring or nut 14. Projecting outwardly, axially from the innerface of the ring 14, is a pin 15 adapted to engage the radiallyprojecting pin 16, which is radially outwardly from is cut away as at 17to provide a pair of diametrically opposite notches 17. Positionedinwardly of this flange 17a is a groove 23. Formed in the end of thesupporting member or adapter 11, outwardly from the threaded portion 13,is a pair of diametrically aligned notches 18. 7

Another adapter is provided which may be termed a tool holder andcomprises a tapered shank 19 having a bore formed therethrough andadapted to engage in the tapered bore 20 of the supporting adapter 11.Projecting the member 19 at the large end thereof and in diametricalalignment are the lugs 22. Formed on the member 19 is the externallythreaded forward portion 19a, on which is adapted to thread the thrustsleeve 42 engaging the thrust ring 43, having a tapered inner surface 44engaging the tapered end 45 of the collet, which is split as at 47 andwhich is provided with the rear or inner tapered portion 46 engaging thetapered bore 20 formed in the portion 19a. Positioned within this colletis the tool 48. The construction is such that when the tool is placedwithin the collet and the parts are located as shown in Fig. 5 and thesleeve 42 threaded into position, the parts will be moved inwardly ofthe tapered portion 19 so that the collet will securely grip the tool48. The part 19 is precision ground, as is likewise the bore 20, so thatwhen the part 19'engages in the bore 20, a very close fit will beefiected.

In assembling the structure, the ring 14 would be threaded onto thethreaded portion 13 to the desired position, and the pin 16 would thenbe driven into the position shown in Fig. 2. The construction would be,such that when the locking ring or nut 14 is turned counterclock wiseuntil the pins 15 and 16 engage, the notches 17 and 18 will be inalignment with each other. When in this position, the tool holder oradapter 19 may then be thrust into the bore 20, the lugs 22 passingthrough the notches 17 and 18 so as to be aligned with the groove 23.When in this position, a clockwise threading of the nut or locking ring14 will serve to draw the member 19 inwardly into the supporting memberor adapter so as to secure it in the bore 20 in a fit which will preventrotation. These lugs 22 are ground slightly less in width than the widthof the groove 23, so that the lugs 22 will freely ride in the groove 23.When it is desired to remove the member 19, a threading of the lock nutor ring 14 counterclockwise will, through the engagement of the sidewall of the groove 23 with the lugs 22,force the member 19 outwardly sothat when the notches 17 and 18 again come into alignment the member 19may be drawn outwardly from the supporting member or adapter 11. Whenthe member 19 is secured in operative position in the hole in thesupporting member or adapter 11, the lugs 22 will of course beprojecting through the notches or slots 18. The side faces 24 and 25 ofthese lugs 22 are tapered, as are likewise the sides 26 and 27 of theslots or notches 18. This taper is such that, when the driving action isefiected which is in a clockwise direction, the lugs 22 will have atendency to ride inwardly of the tapered faces 26 and 27 so that themember 19 is thus forced farther inwardly of the bore 20 and a verytight fit effected. This is particularly effective in preventing thetool holder loose under cutting vibration.

I In Fig. 7 I have shown a slight modification in which the member 12corresponds to the member 11 and is provided with a pin 16;; and thetapered bore 20a. This member 12 is also provided with a threadedportion on which the lock ring or nut 53 corresponding to the member 14is threaded The tool holder or adapter 49 is split at its inner end asin 50 and provided with a tapered bore 51 into which the tool isinserted. to the lugs 22 and are similarly made.

or adapter from working,

The lugs 52 correspond It is believed obvious that these adapters may bedesigned and ground to accommodate various tools including shell endmills and many other types of tool. It is also believed obvious that theforward end may be extended and broached to make it a boring bar.

Experience has shown that a tool holder of this class is one which ispossessed of the advantages enumerated, and maintains the working toolalways in proper position regardless of how many times the tool may bechanged and replaced.

What I claim is:

1. A quick change tool holder of the class described, comprising asupporting member having a bore formed therein, and provided at one endwith a pair of diametrically aligned axially directed slots; anexternally threaded portion inwardly from said slots; an abutment memberprojecting outwardly from the periphery of said member inwardly of saidthreaded portion; a locking ring threaded on said threaded portion andhaving at its outer end a pair of diametrically aligned slots adaptedfor aligning with the slots in said holding member; an abutment membercarried by said ring and adapted for engaging said first-mentionedabutment member upon the aligning of said slots; a radially, inwardlyprojecting flange on said locking ring interrupted by the slots formedtherein and forming one wall of an annular groove on said locking ring;a tool retainer comprising a shank adapted for engaging in said bore andhaving a bore formed therethrough; a tool engaging in said bore andprojecting outwardly from one end of said retamer; means for securingsaid tool in said bore in fixed relation thereto; a pair ofdiametrically opposed radially projecting lugs projecting outwardly fromthe periphery of said retainer adjacent one end thereof and adapted forpassing into said slots upon insertion of said retainer into said boreand engaging in said groove and adapted upon rotation of said lockingring for engaging behind said flange.

2. A quick change tool holder of the class described, comprising: asupporting member having a bore formed therein and provided at one endwith a pair of diametrically opposite, axially directed slots directedinwardly from said end and terminating adjacent an externally threadedportion of said member; a radially directed pin projecting outwardlyfrom the periphery of said member inwardly of the threaded portion; acollar threadable on said threaded portion and projecting at one endbeyond the end of said member, said collar having an internal grooveformed therein adjacent the projecting end to provide at said projectingend a radially, inwardly directed flange, said flange having slotsformed therein at a pair of diametrically opposite points and adaptedfor alignment with the slots in said member; and a pin carried by saidcollar engageable with the pin in said member for limiting rotation ofsaid collar on said member in one direction upon the alignment of theslots in said flange with the slots in said member.

3. A quick change tool holder of the class described, comprising: asupporting member having a bore formed therein and provided at one endwith a pair of diametri cally opposite, axially directed slots directedinwardly from said end and terminating adjacent an externally threadedportion of said member; a radially directed pin projecting outwardlyfrom the periphery of said member inwardly of the threaded portion; acollar threadable on said threaded portion and projecting at one endbeyond the end of said member, said collar having an internal grooveformed therein adjacent the projecting end to provide at said projectingend a radially inwardly directed flange, said flange having slots formedtherein at a pair of diametrically opposite points and adapted foralignment with the slots in said member; and a pin carried by saidcollar engageable with the pin in said member for limiting rotation ofsaid collar on said member in one direction upon the alignment of theslots in said flange with the slots in said member; a tool retainerhaving a body insertable at one end into said bore; a pair ofdiametrically opposite lugs projecting outwardly from the periphery ofsaid body and projectable through the slots in said flange and into theslots of said body and engageable in said groove, and engageable behindsaid flange upon rotation of said collar relatively to said body foreffecting a disalignment of the slots in said flangewith the slots insaid 7 body.

4. A quick change tool holder of the class described, comprising; asupporting member having a bore formed therein and provided at one endwith a pair of diametrically opposite, axially directed slots directedinwardly from said end and terminating adjacent an externally threadedportion of said member; a radially directed pin projecting outwardlyfrom the periphery of said member inwardly of the threaded portion; acollar threadable on said threaded portion and projecting at one endbeyond the end of said member, said collar having an internal grooveformed therein, adjacent the projecting end to provide at saidprojecting end a radially inwardly directed flange, said flange havingslots formed therein at a pair of diametrically opposite points andadapted for alignment with the slots in said member; and a pin carriedby said collar engageable with the pin in said memher for limitingrotation of said collar on said member in one direction upon thealignment of the slots in said flange with the slots in said member; atool retainer having a body insertable at one end into said bore; a pairof diametrically opposite lugs projecting outwardly from the peripheryof said body and projectable through the slots in said flange and intothe slots of said body and engageable in said groove, and engageablebehind said flange upon rotation of said collar relatively to said bodyfor effecting a disalignment of the slots in said flange with the slotsin said body, the side faces of the slots of said body being inclined tothe axis of said body and the opposing faces of said lugs opposing theside faces of said slots of said body, being inclined for effecting aninward thrust from said retainer upon rotation of said body.

5. In a quick change tool holder of the class described, a supportingbody having a bore formed therethrough adapted for attachment forrotation with a machine with which used; an externally threaded portionon said body adjacent one end and positioned inwardly therefrom, saidend having a pair of axially directed slots projecting inwardly fromsaid end toward said threaded portion; a nut-forming sleeve threaded onsaid threaded portion and projecting beyond the end of said body, saidsleeve having an internal groove formed adjacent its projecting end onthe inner surface thereof to provide adjacent the outer end of said bodya radially, inwardly projecting flange, there being formed in saidflange a pair of slots adapted for registration with the slots in saidbody upon rotation of said sleeve to a predetermined position; anabutment member on said body;- an abutment member on'said sleeve adaptedfor engaging the abutment member on said body upon rotation of saidsleeve to a predetermined position;

the slots in said flange being so positioned that, upon rotation ofsaidsleeve in one direction for bringing said abutment members intoengagement, the slots in said flange will be in registration with therespective slots in said body.

6. In a quick change tool holder of the class described, a supportingbody having a bore formed therethrough adapted for attachment forrotation with a machine with which used; an externally threaded portionon said body adjacent one end and positioned inwardly therefrom,

said end having a pair of axially directed slots projecting inwardlyfrom said end toward saidthreaded portion; a nut-forming sleeve threadedon said threaded portion and projecting beyond the end of said body,said sleeve having an internal groove formed adjacent its projecting endon the inner surface thereof to provide adjacent the outer end of saidbody a radially, inwardly projecting flange, there being formed in saidflange a pair of slots adapted for registration with the slots in saidbody. upon rotation of said sleeve to a predetermined position; anabutment member on said body; an abutment member on said sleeve adaptedfor engaging the abutment member on said body upon rotation of saidsleeve to a predetermined position; the slots in said flange being sopositioned that, upon rotation of said sleeve in one direction forbringing said abutment members into engagement, the slots in said flangewill be in registration with the respective slots in said body; a toolretainer having a portion adapted for insertion into the bore of saidbody; a pair of diametrically outwardly projecting lugs on said toolretainer projectable through the slots formed in said flange and intoregistration with said groove, and adapted upon threading of said sleevein one direction for forcing said retainer inwardly of said bore, andupon threading of said sleeve in the opposite direction for forcing saidretainer out of said bore.

7. A quick change tool holder of the class described, comprising; asupporting member havin a bore formed therein and provided at one endwith axially directed slots extending inwardly from the end face of saidend and terminating adjacent an externally threaded portion of saidmember; a locking ring immediately threadable onto said threaded portionin embracing relation to said face; an inwardly directed flange on theouter end of said ring having cut out portions registering with saidslots upon rotation of said ring to a predetermined position and beingin non-registration with said slots upon rotation out of saidpredetermined position, the inner face of said flange being flat; a toolretainer having a body insertable at one end into said bore; flat-facedlugs projecting outwardly from the periphery of said body andprojectable through the cut out portions of said flange and into saidslots, and engageable behind said flange upon rotation of said ring outof said predetermined position.

8. A quick change tool holder of the class described, comprising; asupporting member having a bore formed therein and provided at one endwith axially directed slots extending inwardly from the end face of saidend and terminating adjacent an externally threaded portion of saidmember; a locking ring immediately threadable onto said threaded portionin embracing relation to said face; an inwardly directed flange on theouter end of said ring having cut out portions registering with saidslots upon rotation of said ring to a predetermined position and beingin non-registration with said slots upon rotation out of saidpredetermined position, the inner face of said flange being flat; a toolretainer having a body insertable at one end into said bore; flat-facedlugs projecting outwardly from the periphery of said body andprojectable through the cut out portions of said flange and into saidslots, and engageable behind said flange upon rotation of said ring outof said predetermined position, said lugs engaging at one or" theirfaces with the bottom of said slots and at their opposite faces withthe'opposed face of said flange.

References Cited in the file of this patent UNITED STATES PATENTS386,262 Pedersen July 17, 1888 717,199 Hollm Dec. 30, 1902 1,041,338.Palmgren Oct. 5, 1912 1,075,245 Farnum Oct. 7, 1913 1,372,482 Clane Mar.22, 1921 1,867,296 Woodrut July 12, 1932 2,272,185 Chittenden Feb. 10,1942 2,359,594 Turenchalk et al. Oct. 3, 1944 2,476,874 Johansson July19, 1949 2,511,416 Rundroff June 13, 1950 2,579,082 Kramer Dec. 18, 19512,611,621 Patterson et al. Sept. 23, 1952

